MCR 0156 – Amending Generator Unit ID and Generation Unit ID

Background: A number of documentation issues have arisen with the Generation Unit ID data item that requires correction: (Please note that schema 6.1 is correct and does not require change.)

• ‘Generation Unit ID’ is a data item that appears on numerous market messages in the schema in all versions of the market design.

• Under SEM another entity (a wholesale definition) called ‘Generator Unit ID’ is introduced. This is part of the retail market design from version 6.0 onward. However, ‘Generator Unit ID’ has not been added to the schema and should not appear as a field in any market message documentation.